# -*- coding: UTF-8 -*-
from collections import defaultdict
from typing import List
from leetcode_helper import TestcaseHelper, SolutionBase


class Solution(SolutionBase):
    # 解题的方法，命名和Leetcode的保持一致即可
    def fractionToDecimal(self, numerator: int, denominator: int) -> str:
        negative = True if numerator * denominator <0 else False
        numerator = abs(numerator)
        denominator = abs(denominator)
        
        quotient = numerator // denominator
        reminder = numerator % denominator
        
        fraction = []
        
        ans = []
        if negative:
            ans.append("-")
        
        ans.append(str(quotient))
        
        if reminder != 0:
            ans.append('.')
            '''
            用dict来保存余数和对应的index
            '''
            
            reminder_dict = {}
            fraction_index = 0
            start_index = -1
            end_index = -1
            fraction = []
            while reminder > 0:
                if reminder_dict.get(reminder, -1) != -1: # 发现重复出现的余数
                    start_index = reminder_dict[reminder]
                    end_index = fraction_index
                    break
                else:
                    reminder_dict[reminder] = fraction_index
                    fraction_number = (reminder * 10) // denominator
                    reminder = (reminder * 10) % denominator
                    fraction_index += 1
                    fraction.append(str(fraction_number))

            if start_index != -1 and end_index != -1:
                fraction.insert(start_index, "(")
                fraction.insert(end_index + 1, ")")

        return "".join(ans) + "".join(fraction)


if __name__ == '__main__':
    solution = Solution()

    # 按照leetcode的题目说明，将基本的test case填入
    # 每条case的最后一个元素是正确的结果，即期待的结果
    # 使用元组来保存输入的数据，期待的结果
    testcases = [
        (2, 3, "0.(6)"),
        (4, 333, "0.(012)"),
        (-1, 2, "-0.5"),
        (1, 2, "0.5"),
        (2, 1, "2"),
        (1, 5, "0.2")
    ]

    for case_item in testcases:
        # 获取测试用的case和期待的执行结果
        input1 = case_item[0]
        input2 = case_item[1]

        expect = case_item[len(case_item) - 1]

        exec_result = solution.fractionToDecimal(input1, input2)

        # 判断执行结果，输出提示信息
        check_result = solution.check_result(expect, exec_result)
        TestcaseHelper.print_case(check_result, case_item, exec_result)


